Music – Instruments
Patent
1979-05-17
1981-09-08
Witkowski, Stanley J.
Music
Instruments
84DIG2, 84DIG23, G10H 122, G10H 500
Patent
active
042878020
ABSTRACT:
An electronic musical instrument having its keyboard divided into plural key ranges with musical tones being generated with tone colors which are different one key range from another. For achieving this object, the instrument comprises channel processors, tone generators, additional tone generators for the lowest (or highest) key in each key range, a common key coder for obtaining key data of depressed keys and a control circuit for supplying key codes delivered out of the key coder to only a channel processor of a corresponding key range. The key coder delivers out key data of depressed keys sequentially one key data at one time slot. According to the invention, the lowest (or highest) tone in a predetermined key range is generated with a tone color corresponding to the key range and also with a different tone color. The time slot allotted to the lowest (or highest) key is divided into two halves and a key code of the lowest (or highest) key is applied to a corresponding channel processor during the first half and is applied to a tone generator for the lowest (or highest) key after being once stored in a register. A lowest key detection circuit generates a pulse defining the second half of the time slot.
REFERENCES:
patent: 4122744 (1978-10-01), Uetrecht
Imamura Akio
Katada Naota
Nippon Gakki Seizo Kabushiki Kaisha
Witkowski Stanley J.
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